Synthesis And Modification Of Lini_0.5Mn_1.5O₄ As Cathode Materials For Lithium-ion Batteries

Lithium ion batteries as the most efficient and convenient energy storage its energy desity is restricted by the cathode materials. To improve the energy density spinel Li Ni0.5Mn1.5O4 is becoming a promising high-voltage cathode material which can reversibly intercalate/ deintercalate lithium ions at 4.7 V.In this thesis, we make a summing up of different methods to prepare spinel Li Ni0.5Mn1.5O4. A high-performance Li Ni0.5Mn1.5O4 has been prepared by an improved solid-state method..1. The electrochemical performance of Li Ni0.5Mn1.5O4 prepared by a kind of methods have been compared, solid phase synthesis method of high efficiency Li Ni0.5Mn1.5O4 have been prepared by solid-state method has higher efficiency than wet-state method, but synthesis of single-phase Li Ni0.5Mn1.5O4 often results in accompanying undesired impurities by solid-state method2. Comparison of the effect of electrochemical performance of the various coating and doping elements on3. A high-performance Li Ni0.5Mn1.5O4 has been prepared by an improved solid-state method. Test shows that the sample has a very good rate capability, cycle performance, and high discharge.